// 320px、360px、375px、384px、400px、414px、500px、640px、720px、750px
@copies: 15;
@media screen and (min-width:320px) {
    html {
        font-size: 320px / @copies;
    }
}
@media screen and (min-width:360px) {
    html {
        font-size: 360px / @copies;
    }
}
@media screen and (min-width:375px) {
    html {
        font-size: 375px / @copies;
    }
}
@media screen and (min-width:384px) {
    html {
        font-size: 384px / @copies;
    }
}
@media screen and (min-width:400px) {
    html {
        font-size: 400px / @copies;
    }
}
@media screen and (min-width:414px) {
    html {
        font-size: 414px / @copies;
    }
}
@media screen and (min-width:500px) {
    html {
        font-size: 500px / @copies;
    }
}
@media screen and (min-width:640px) {
    html {
        font-size: 640px / @copies;
    }
}
@media screen and (min-width:720px) {
    html {
        font-size: 720px / @copies;
    }
}
@media screen and (min-width:750px) {
    html {
        font-size: 750px / @copies;
    }
}